package com.smart.car.common.res.utils;

import lombok.extern.slf4j.Slf4j;
import javax.servlet.http.HttpServletRequest;

/**
 * ip工具类
 * web版本，非网关版，
 *
 * @author zoutao.blog.csdn.net
 * @date 2021/4/7
 */
@Slf4j
public class IpByWebUtil {

    //获取ip地址
    public static String getIpAddr(HttpServletRequest request) {
        String ip = null;
        //String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Real-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("x-forwarded-for");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_CLIENT_IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割。
        if (ip != null && ip.length() > 15) {
            //String[] ips = ip.split(",");
            if (ip.indexOf(',') > 0) {
                ip = ip.substring(0, ip.indexOf(','));
            }
        }
        return ip;
    }
}